This website requires certain cookies to work and uses other cookies to help you have the best experience. By visiting this website, certain cookies have already been set, which you may delete and block. By closing this message or continuing to use our site, you agree to the use of cookies. Visit our updated privacy and cookie policy to learn more.

This Website Uses CookiesBy closing this message or continuing to use our site, you agree to our cookie policy. Learn MoreThis website requires certain cookies to work and uses other cookies to help you have the best experience. By visiting this website, certain cookies have already been set, which you may delete and block. By closing this message or continuing to use our site, you agree to the use of cookies. Visit our updated privacy and cookie policy to learn more.

Filter Selection: A Standard Procedure (June 2000)

With today’s complex IAQ challenges, how do you select the best air filtration for a building? A new standard known as ANSI/ASHRAE 52.2-1999, Method of Testing General Ventilation Air Cleaning Devices for Removal Efficiency by Particle Size, should help to pave the way. This standard allows hvac contractors, building operators, and others to evaluate filters based on controlled and repeatable laboratory testing, providing much more reliable comparisons. It establishes minimum efficiencies for filters, a more stringent and conservative measure than the previously used average efficiency. And, for the first time, it allows filter selection based on offending contaminants and their particle sizes – making the selection process much more specific and targeted than ever before.

Events

Standby generators require electrical protection against potential faults and damage. Selecting the appropriate protective devices and functions often requires striking a balance between protection and continuity of operation. Code requirements for emergency systems and health care facilities, or parallel operation with the utility, can add another layer of complexity to this topic.

Data centers are critical to the world’s existence. Every segment of human activity, including energy, lighting, telecommunications, transportation, public health, entertainment, and infrastructure, are controlled by data centers. Growth in this sector is exploding. In 2017, approximately 48 mergers and acquisitions were completed totaling nearly $20 billion, which exceeded the total in 2015 and 2016 combined, according to Jones Lang LaSalle IP Inc. In the November issue of Engineered Systems, we explore some of the trends surrounding the data center boom and how HVACR engineers are keeping up with the exponential demand.